Detectives are asking for help following the death of champion shot putter Rio Andrew after he supposedly drank a lethal concoction of ketamine laced beer.

The 15-year-old, of Notting Hill, was rushed to hospital in the early hours of Sunday (June 15) morning after he collapsed and became ill at an illegal rave in a disused Royal Mail sorting office in Croydon.

He sadly died in hospital yesterday (June 16).

Rio was a star of the Thames Valley Harriers based in Wormwood Scrubs' Linford Christie Stadium and was a star pupil at Holland Park School where he was due to be given a prestigious sports award this Friday.

He was also selected by the Jamaican national team during the London 2012 Olympics to be part of their guard of honour during the Games, where he waved the Jamaican flag as the team entered the stadium for the opening night parade.

Detectives from Croydon CID now want to speak to anyone who may have been with Rio or who saw him on Saturday night into Sunday morning.

DCI Steve Baxter, who is leading the investigation, said: "Rio went out for the night with his friends, his parents had every right to expect that he would return home safe and well. Sadly, he didn't and my thoughts are with his family at this very difficult time.

"There has been speculation that Rio's death was caused by drugs, at this stage no one can say that with certainty as we are still waiting for the results of the post mortem.

"I want to speak to anyone who saw Rio during Saturday night, as he travelled from his home in Notting Hill to Croydon, to help us build up a picture of his night out. If someone did sell or give Rio drugs then I want information to help us catch whoever that was.

"If you know anything or saw anything that night please get in touch and help our investigation."

Anyone with any information is asked to contact Croydon CID on 0203 276 2264 or Crimestoppers anonymously on 0800 555 111.